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Goodwill And Other Intangible Assets (Schedule Of Intangible Assets With Determinable Useful Lives By Major Category) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Intangible Assets    
Gross Carrying Amount $ 142,300 $ 142,300
Accumulated Amortization (93,192) (90,753)
Net Carrying Amount 49,108 51,547
Trade Names    
Intangible Assets    
Gross Carrying Amount 22,500 22,500
Accumulated Amortization (16,342) (15,869)
Net Carrying Amount 6,158 6,631
Technology Know-How    
Intangible Assets    
Gross Carrying Amount 55,300 55,300
Accumulated Amortization (43,263) (42,371)
Net Carrying Amount 12,037 12,929
Customer-Related Intangible Assets    
Intangible Assets    
Gross Carrying Amount 64,500 64,500
Accumulated Amortization (33,587) (32,513)
Net Carrying Amount $ 30,913 $ 31,987